Crushing and pulverizing machinery.



Patented Sept. I8, |900 T. R. GOTH. CRUSHING AND PULVERIZING MACHINERY.

(Application led May 3l. 1899.)

(No Model.)

TH: Nomura PETERS co, warum-Ha.. wsmNcrw, n. c.

UNITED STATES 1 'PATENT OFFICE.

vTIIoMAs n. corn, oF sAN FRANcIsco, CALIFORNIA,

cRUsHlNc ANI; PULvERlzlNe MACHINERY.

SPECIFICATION forming part of Letters Patent No. 657,933, dated September` 18, 1900.

- Application led May 31, 1899. Serial No. 718.860. (No model.) A

To all whom it may concern:

Beit known that l, THOMAS R. GOTH, a citiy zen of Canada, residing at San Francisco, county of San Francisco, and `State of Califoring to be a full, clear, and exact description ,of the same, reference being had to the accompanying drawings, forming a part of this specification.

My 1n vention relates to machines for crushing and pulverizing mineral substances and to certain improvements therein.

My Improvements consist in the combina- ,tion of gyratory crushing devices combined with pulverizing apparatus having various Anovelfeatures in the mannervof their operation and construction, hereinafter fully pointed out and explained in connection with drawings that form a part of this speciication.

The objects of my invention are to com? .bine within small space suflicient pulverizing apparatus that Will operate over the Whole range from roughly-broken minerals to a inely comminuted state of the same; also, to

screen thev same and select for further treatment such particles as are not reduced to the required degree of ineness; also,to so arrange the crushing and pulverizing parts that the force on these will react one upon the other and be absorbed Without falling upon the driving-shafts or axial members of the machine.

To these ends I construct pulverizing-machines as illustrated in the drawings herewith, forming a part of this specification.

Figure I represents in sectional elevation a crushing and pulverizing machine made according to my invention; and Fig. II, a section, except as to the driving-shaft, through the main member or base of the machine on the line .fr in Fig. I.

Similar numerals of reference indicate corresponding parts in both figures of the drawings.

Referring to the drawings, 1 is the main frame, which can be constructed of metal or Wood, the latter being chosen for the purpose, of illustration.

2 is the main driving shaft or spindle, shown ywhen the lever 27 is removed.

With a pulley 3 to receive a band direct, a construction suitable for the smaller-class of machines. In machines of larger size the power can be communicated by a horizontal shaft and bevel-gearing in the usual, manner of driving machinery of this type.

4 is a main member constituting a base for the machine proper and is mounted on the top of the frame 1 high enough to permit the finished material to descend by gravity through chutes 35 37 to a place of storage or use. Integrally formed vWith this base or main chamber 4 is a concave seat or circular groove 5 for the pulverizing-balls 7, preferably provided with a removable linings, made of suitable material to resist as much as possible the abrasive Wear. From this seat or groove 5 and integral therewith is a hopperlike extension 8, that collects and discharges the pulverized material around the shaft 2 at the center.

superimposed on the member 4 and bolted thereto is a crushing cylinder or concave 9, made preferably with a parallel bore or so the muller 18 can be lifted out through the top The top 31 of this cylinder 9 is made flaring in hopper form to receive the material to be crushed, as Will be hereinafter explained.

The revoluble or operating member 10 is impelled by a squared extension 11 of a driving device 12, attached to the shaft 2 by a screw 13 or in any other suitable manner. At the top of the driver 12 is a spherical pivot 14, that sustains in part the Weight of the member 10 and holds the parts in alinement. This member is provided at the top with an inclined and eccentric raceway 52 to receive the balls 19, which operate the muller 18, and on the bottom With a raceway of larger diameter to receive the pulverizing-balls 7, the relative position of these raceways producing the force to operate the muller 18 bya Wedging action exerted on the line a. The thrust of balls 7 is conveyed to the muller on the linea and as nearly as possible to coincide with or balance the lateral crushing force on vthe muller 18; but in case this thrust is not balanced the muller 18 is given a short bearing at 22 on the stem 15, the latter being shown at an angle to coincide with this bearing at 22. The member 10 is in eect a cir- IOO cular wedge moving on balls between the crushingand pulverizingfaces. Itbearsupon the pulverZing-balls 7 and is made with a strong stem 15, which is shown oblique to the axis of rotation, as indicated by dotted lines at 17. Around the base of ihis stem 15 is a circular concave inclined and eccentric raceway-seat 52 to receive a row of bearing-balls 19, that support the muller 18 and imparts to it the main crushing force, which, as may be seen, is reactive from and translated in a nearly-direct line to t he opposite pulverizingballs 7. The -trough 52, as before explained,

is eccentric to the axis of rotation and the plane of its base is slightly inclined toa horizontal. 'lhe in uller 18 is conical in form, and being loosely mounted on the bearing-balls 19 it is evident that as soon as material passes into the crushing-space 20 it becomes wedged between the muller 18 and cylinder 9, and the muller 18 will not revolve with the stem and balls, but will be forced outward and upward at the bottom, according as it receives thrust from the balls 7 and 19, owing to the eccentricity and inclination of the raceway 52, this eccentric and upward and oblique motion crushing the material in the annular space 2() ne enough to pass down through the throat at 23 to the pulverizing-balls 7. This throat is shown exaggerated in size in Fig. I to more clearly illustrate the eceentricity of the muller 18. The crushing strain of the muller 18 and of the balls 19 are thus in opposite directions, reactive,and inherent in the machine, relieving the shaft 2 and stem 15 from lateral strain. At the top of the stem 15 is a plate or washer 24 to prevent grit from enteringr the top bearing 22 of the muller I8. A reduced extension 25 of the stem 15 extends upward to receive the lever 27. This lever is to exert pressure on the top of the stem 15 and through this and the member 10 to regulate the pulverizing pressure on the balls 7. Adjustable pressure is exerted on this lever by means of the hand-wheel 32 and screw 30. In this manner the balls 7 are pressed into their seat or upon the material by the weight of the member 10 and its connected parts by the lever 27, also by the oblique crushing strain upon the muller 18, the member 10 being, however, free to rise within limits from the pivot 14 and have an upward or oscillatory movement to accommodate the varying size of the material operated upon by the balls 7. To keep the spherical pivot 14 in contact and maintain alinement of the parts, a thrust-screw is provided to raise the step 34 and the shaft 2, which is supported therein. The same means can be employed to oppose the action ofthe screw 30 and the pulverizingballs be then set clear of their seat to do coarse work should that be required. The material after being pulverized by the balls 7 descends by the hopper 8 and falls on a revolving screen 38, attached to a frame 39, fastened to the shaft 2, and is moved outward on this screen by centrifugal force and by the action of the curved brushes 40, that are set eccentrically, as shown in Fig. Il. 'lhese brushes are fastened. to the ledges 42, cast on the ribs 43, extending downward from the main member 4, and by their rubbing.r action force the fine material th rough screen 38, from Where it falls into the pan 44 and is swept into the chute 37 bythe vanes 45, cast on the bottom of the revolving frame 40. Coarse material that will not pass through the screen 38 is swept over the periphery of the screen 38 and falls into the channel 47, around the pan 44, formed by the rim 48, and is swept into the chute 35 by the vanes 51 and is collected to be again passed through the m achine. The circular pan 44 has a central nipple 49 to prevent fine material from escaping around the shaft 2 and is made to surround the operating parts of the machine up to the top of the frame 1, where it is held by a flange 50, as shown in Fig. I.

The eccentricityand inclination ofthe raceway 52 and the lateral range of the muller 18 are in different machines adapted to the material operated upon and the fineness required. The groove or channel 41 in the top of the member 10 is to catch any oil that may drain down from the beai'ings of the muller 18 and prevent the oil from passing with the material to the pulverizingapparatus below.

I do not confine myself to the precise construction shown. In various parts of the machine modied mechanism can be substitut-ed as, for example, cones or a sliding bearing can be substituted for the balls 19, and other details are susceptible of modification without departing from the essential features of my invention.

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Pat-ent, is-

1. In a combined crushing and pulverizing machine,a superimposed crushing-muller and a cylinder or casing therefor, a train of balls to operate the muller rolling in a revoluble inclined raceway set eccentric to the axis of revolution and incline'd to the plane of its orbit to produce a gyratory movement ot' the muller and apply an oblique force thereto, substantially as specified.-

2. In a combined crushing and pulverizing machine, the revoluble member 10 having on its top an inclined and eccentric raceway for aseries of bearing-balls and a gyratory muller mounted thereon, a larger guide or way on the bottom to receive a train of pulverizingballs that oppose their pressure obliquely to the upper train of balls and to the gyratory muller, substantially as specified.

3. In a combined crushing and pulverizing machine, anon-revoluble muller resting upon and actuated by a series of balls, a revoluble raceway for these balls set eccentric to a shaft by which the raceway is driven and at an in elinatiou from a horizontal plane and means to revolve the raceway, substantially as shown and specified.

IIO

4. In a combined crushing and pulverizing machine, a superimposed gyratory muller supported on and actuated by rolling balls, mounted in a revoluble member having an inclined and eccentric racewayl on the top and a concentric groove or guide for pulverizingballs on the bottom, these race or guide ways of different radius to give the upper and lower balls an oblique position in the line of pressure and in respect to the axis of revolution, the two sets of balls therein opposing each other and exerting an oblique force on the gyrating muller, as specified.

5. The revoluble member 10 having an inclined and eccentric raceway on its top for the balls 19, a concentric Way or groove on its bottom to receive the pulverizing-balls 7, the stem 15 and adjustable means for applying pressure on this stem and thereby to the pulverizng-balls 7, substantially as specified.

6. In a combined crushing and pulverizing machine a ball pulverizingapparatus, a super-l imposed crushing apparatus, a rotative bearing member resting on the pulverizing-balls provided with an upward-projecting stem set eccentric at the base and oblique to the axis of rotation, a tapering muller mounted on the stem resting on a ball-bearing at its base and an embracing crushing-cylinder around the muller so disposed and made that the muller can pass out of the top of the cylinder substantially as specified.

'7. In a combined crushing and pulverizing machine, the revoluble member 10 pivotally supported on a main driving-shaft and provided with an inclined and eccentric raceway on its top, a series of balls therein, a superimposed muller resting on these balls and deriving an angular or upward and lateral thrust therefrom, substantially as specified.

8. In a combined crushing and pulverizing machine, a frame,1a verticaldriving shaft or spindle, a circular concave seat, with balls therein heavy member 10, centrally mounted onthe spindle, inclined stem 15, conical gyratory muller 18, with ball-supports, and surrounding cylinder 9, having daring mouth 31, substantially as specified.

9. The combination of vertically-adjustable driving-shaft 2, concave seat 5, balls 7, heavy member 10, inclined stem 15, conical muller 18, cylinder 9, lever 27, and means to apply pressure through said lever to the pul- Verizing-balls 7, substantially as specified.

10. In a combined crushing and pulverizing machine, an eccentric non-revoluble crushing-muller, an eccentric and inclined revolving raoeway and guide with rolling balls to actuate the muller, a hopper below the pulverizing parts to discharge centrally around the driving-shaft, and a revoluble screen in combination therewith attached to the driving-shaft below the pulverizing apparatus,

Asubstantially in the manner shown and described.

THOMAS R. GOTH.

Witnesses:

ALFRED A. ENQUIsT, HENRY H. BATES. 

